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Texas Instruments TPS3823-50DBVTG4
- Part No.:
- TPS3823-50DBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3823-50DBVTG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,211
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Product details
Overview
TPS3823-50DBVTG4 from Texas Instruments is a fixed-threshold voltage supervisor IC with integrated watchdog timer, active-low push-pull reset output, manual reset input, and 5V supply monitoring capability. It asserts RESET when VDD falls below 4.46–4.64 V (−40°C to 85°C), provides 200 ms reset delay, consumes 15 µA typical supply current, and operates in a 5-pin SOT-23 package for microcontroller power-on initialization and fault recovery in embedded systems.
For engineers reviewing the TPS3823-50DBVTG4 datasheet, TPS3823-50DBVTG4 pinout, TPS3823-50DBVTG4 application, or TPS3823-50DBVTG4 equivalent, this page delivers verified electrical specifications, functional pin roles, real-world use cases in processor-based equipment, and validated alternative parts - all grounded in TI's SLVS165O production data sheet (March 2025 revision).
Technical Context
The TPS3823-50DBVTG4 implements a precision bandgap-based voltage reference and hysteresis comparator to monitor VDD against a fixed 4.55 V nominal threshold (VIT−) with 50 mV hysteresis. Its internal 200 ms power-on reset timer begins after VDD exceeds VIT− + VHYS, ensuring stable system boot before releasing RESET.
It integrates a 1.6 s watchdog timeout (ttout) triggered by missing WDI transitions, with automatic clearing on falling-edge detection or RESET assertion. The MR input forces immediate reset independent of VDD level, and the push-pull RESET output drives logic-level loads without external pull-up components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 1.1 V to 5.5 V - supports operation during brown-out and enables use with 5 V rails while tolerating transient dips. |
| Threshold voltage (VIT−) | 4.46–4.64 V (−40°C to 85°C) - precisely monitors 5 V supplies with guaranteed trip point across temperature. |
| Reset delay time (td) | 120–300 ms - ensures sufficient hold time for microcontroller core and peripherals to stabilize post-power-up. |
| Watchdog timeout (ttout) | 0.9–2.5 s - detects firmware hangs or communication failures in host processors without requiring software polling. |
| Supply current (IDD) | 15–25 µA - enables integration into battery-backed or low-power always-on subsystems with negligible quiescent load. |
| Output type | Active-low push-pull - drives RESET directly to GND or VDD without external components; compatible with standard CMOS inputs. |
| Input hysteresis (VHYS) | 50 mV - prevents oscillation during slow-rising or noisy supply ramps near threshold. |
Pinout & Package
TPS3823-50DBVTG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for space-constrained PCB layouts in portable and industrial control applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull output | Drives downstream reset line low during fault or power-up; returns high after td delay when VDD remains above VIT−. |
| 2: GND | Ground reference | Primary return path for internal circuitry and output stage; must be connected to system ground plane for noise immunity. |
| 3: MR | Manual reset input | Active-low signal: pulling MR low forces immediate RESET assertion regardless of VDD or watchdog state. |
| 4: WDI | Watchdog timer input | Falling-edge-triggered input; absence of transitions > ttout triggers RESET; floating WDI internally toggles to prevent false timeout. |
| 5: VDD | Supply and monitored rail | Powers the IC and serves as the monitored voltage source; RESET asserts if VDD drops below VIT−. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 5 V supervision | Guaranteed VIT− = 4.46–4.64 V across −40°C to 85°C eliminates need for external resistor divider calibration. |
| Integrated watchdog timer | 1.6 s nominal timeout detects unresponsive firmware without adding discrete timing components or MCU overhead. |
| 200 ms reset delay | Ensures reliable release of RESET only after VDD stabilizes above threshold + hysteresis, preventing premature boot. |
| Manual reset input (MR) | Enables hardware-initiated system reset via front-panel button or system-level fault signal, independent of supply status. |
| Low quiescent current | 15 µA typical IDD allows deployment in always-on supervisory paths without impacting battery life or standby power budgets. |
Applications
| Microcontroller Power Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
Use Scenario: Ensuring clean boot of an MSP430 or ARM Cortex-M microcontroller after cold start or brown-out event. IC Role / Device Role / Timing Role: Monitors 5 V supply rail and asserts active-low RESET until VDD exceeds 4.46 V and remains stable for ≥200 ms. Use Value: Prevents code execution at marginal voltage, eliminating undefined behavior and flash corruption risks during unstable power conditions. |
Use Scenario: Maintaining deterministic reset behavior in programmable logic controller modules exposed to EMI-rich factory environments. IC Role / Device Role / Timing Role: Provides voltage supervision and watchdog timeout to recover from firmware lockups caused by electromagnetic interference. Use Value: Guarantees automatic system recovery within ≤300 ms of fault detection, meeting IEC 61000-6-2 immunity requirements for industrial automation. |
| Battery-Powered Edge Sensor Node | Network Router Power Management |
Use Scenario: Supervising 5 V DC-DC output powering a wireless sensor node with ultra-low sleep current. IC Role / Device Role / Timing Role: Asserts RESET during battery voltage sag below 4.46 V and resets MCU if WDI pulses cease due to firmware hang. Use Value: Enables autonomous recovery without host intervention, extending field uptime and reducing remote maintenance needs. |
Use Scenario: Coordinating safe power-up sequencing of CPU, PHY, and memory subsystems in enterprise-grade routers. IC Role / Device Role / Timing Role: Generates synchronized RESET pulse after 5 V rail reaches regulation, then monitors for software livelock via WDI. Use Value: Eliminates race conditions between subsystems and enforces deterministic boot order, improving mean time between failures (MTBF). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-50DBVR | Same electrical specs and pinout; tape-and-reel packaging (3,000 pcs/reel) vs. cut-tape (250 pcs/reel) for TPS3823-50DBVTG4. | No functional difference; suited for high-volume automated assembly where reel feed is required. | Select TPS3823-50DBVR for SMT production lines using pick-and-place feeders; TPS3823-50DBVTG4 suits prototyping and low-volume builds. |
| TPS3828-50DBVT | Open-drain RESET output (vs. push-pull); identical VIT−, td, and ttout; requires external pull-up resistor. | Enables wired-OR reset bus configurations and level translation to non-5 V logic domains. | Choose TPS3828-50DBVT only when shared reset bus or mixed-voltage interface is required; otherwise TPS3823-50DBVTG4 simplifies layout. |
Compared with TPS3823-50DBVTG4, TPS3823-50DBVR offers identical performance in bulk packaging for cost-efficient manufacturing, while TPS3828-50DBVT trades push-pull simplicity for open-drain flexibility - neither is pin-compatible without schematic and layout adjustments.
Availability
TPS3823-50DBVTG4 is available at Aetrix Electronics and suitable for microcontroller power sequencing, industrial PLC supervision, and battery-powered edge sensor nodes requiring stable component supply and long-term obsolescence management.
Supply support for TPS3823-50DBVTG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with over 50 years of innovation in high-reliability industrial and automotive ICs.
The TPS382x family was designed specifically for robust power-on reset and runtime supervision of DSPs, microcontrollers, and microprocessors - delivering precise threshold accuracy, low power, and watchdog safety in compact packages.
FAQ
What is the exact supply voltage threshold range for TPS3823-50DBVTG4?
The TPS3823-50DBVTG4 has a negative-going input threshold voltage (VIT−) of 4.46 V (min), 4.55 V (typ), and 4.64 V (max) across −40°C to 85°C. This range ensures reliable 5 V rail monitoring with margin against tolerance drift and temperature variation, as specified in Section 6.5 of the SLVS165O datasheet.
Does TPS3823-50DBVTG4 require external components for basic operation?
No. The TPS3823-50DBVTG4 operates autonomously with no external resistors or capacitors required for core supervision. A 0.1 µF ceramic bypass capacitor at VDD is recommended for noise immunity, but the internal voltage reference, hysteresis, reset timer, and watchdog circuitry are fully self-contained within the IC.
How does the watchdog timer in TPS3823-50DBVTG4 respond to WDI pin states?
The TPS3823-50DBVTG4 watchdog timer triggers RESET if WDI remains static (high or low) longer than its 0.9–2.5 s timeout. A falling edge clears the timer. If WDI is left floating, the device internally toggles it to prevent spurious timeouts - though a 1 kΩ pull-down is advised if deterministic behavior is critical.
Can TPS3823-50DBVTG4 be used in automotive applications?
TPS3823-50DBVTG4 is characterized for −40°C to 85°C operation and is not AEC-Q100 qualified. It is intended for industrial, computing, and consumer applications. For automotive use, TI recommends the TPS3823A-50 variant (−40°C to 125°C), which shares identical functionality but extended temperature rating.
What is the function of the MR pin on TPS3823-50DBVTG4?
The MR (manual reset) pin on TPS3823-50DBVTG4 is an active-low input that forces immediate RESET assertion regardless of VDD level or watchdog state. When pulled low, RESET stays active for the full 200 ms delay period even after MR returns high - enabling hardware-initiated system reset via buttons, fault signals, or logic controllers.
TPS3823-50DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3823-50DBVTG4 FAQ
1.How can I place an order for TPS3823-50DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3823-50DBVTG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS3823-50DBVTG4 reliable?
The price and inventory of TPS3823-50DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3823-50DBVTG4 is usually 5 days.
3.What payment methods are accepted for TPS3823-50DBVTG4?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3823-50DBVTG4?
TPS3823-50DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3823-50DBVTG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS3823-50DBVTG4?
For technical support, including TPS3823-50DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3823-50DBVTG4 requirements.
6.How does Aetrix verify that TPS3823-50DBVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS3823-50DBVTG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS3823-50DBVTG4 meets industry standards.
7.What is the process for return or replacement of TPS3823-50DBVTG4?
All TPS3823-50DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3823-50DBVTG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS3823-50DBVTG4 part is unused and in its original packaging.
Return procedure for TPS3823-50DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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